(Confirmed?) Bungie Working On Halo 4

I guess Dan Mattrick confirmed Halo 4 in an interview, said Bungie was working on it too?
If this turns out to be true, will any of you be interested in it? I don't really see how they could do more with the story, and quite frankly I'm getting sick of Halo. If this becomes a yearly affair, Bungie needs to die.

I think Professor Pew summed it up pretty well:

[08:31] <ProfPew> In 2009... a new threat.... never seen before fps gameplay... guns... targets.... multiplayer... HALO 4

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